Cavallari, 25, was engaged to Chicago Bears quarterback Cutler, 30, in April 2011 but called it off before reconciling in December.

“We couldn't be more excited," Cutler wrote. "We don't usually comment on our relationship but for the record I never broke up with Kristin. It's unfortunate some people are saying hurtful things during such a joyous moment in our life."

The couple had a baby shower in May, which was attended by Cavallari’s friends Heidi Montag and Stephanie Pratt.